Carbureter.



W13. MARTIN.

CARBURETER.

AIPLIGATIQN FILE-D APR.17, 1914. 1,1 15,951 Patented Nov. 3, 1914.

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W. E. MARTIN. GARBURBTER.

APPLIOATiON FILED-APR. 17, 1914. v 1,115,951, 4 Patented Nov. 3, 1914.

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WILLIAM E. MARTIN, QB STAMFORD, ENGLAND.

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Specification of Letters Eatent.

' Patented Nov. 3, 1914;

Application filed April 17, 1914:. Serial No. 832,528.

To all whom it may concern Be it known that I, WILLIAM' EDWARD Mnnrmg'a subject of the King of Great Britain, residing at Stamford, in the county of Lincoln, England, have invented certain new and useful ,lmprovements in Car bureters for Internal-Combustion Engines, of which the following is specification.

The present invention is an improvement in or modification of the invention for, which I obtained Letters Patent in the- United States of America No. 1038921.

The objects of the present invention are to produce a carburetor which Will give better results, which is quieter in work, and which may be automatic in action.

In the former construction the air shutter and throttle were both located in the mixing chamber, which had an air inlet direct.-

from the atmosphere.

According to the present invention I employ a separate air intake which is circular in cross section and is arranged below the mixing chamber.

The air intake communicates with the mixing chamber by means of a long slot or air opening. In, the mixing chamber is located the slidin throttle which uncovers part of the Jet opening and part of the air opening, as in the former construction.

In the air intake is located an, air shutter which fits the interior of the air intake and has a slot corresponding with the air opening into the mixing chamber. The air shutter is open at one end to receive air and is closed at its other end.

The invention'is illustrated in the accompanying drawings, in which I Figure l is a plan of the complete automatic cifrbureter. Fig. 2 is a vertical sec tion on the line 22 of Fig. 1, and Fig. 3 is a vertical section on' the line 33 of F ig. 1, the arrows indicating the direction in which the sections are seen. Fig. 4 is a vertical section ofa modification taken through the mixing and suction chambers,

showing a hand-controlled carburetor.

a is the float feed chamber, 6 the fuel slot, andc the eccentric pin for regulating the supply of fuel from the float feed chamber to the slot b.

(Z- is the mixing chamber, in the side which is formed the slot 1), e is the sliding throttlelocated in the mixing chamber,

is the induction pipe communicating with jet 6 and part of the air slot f leis an ordinary former construction.

In the air intake 9 is located the oscillating shutter h, which fits the interior of the intake 9 and has a slot h corresponding to the-air slot 9. The air shutter k is open at one end and is closed at the other or inner end, which latter is provided with a spindle 72. passing through a hollow screw 71, which screws int the closed end of the air intake 9. 7.5 The spindl 72, is provided with a lever h by means 0f WlllCl1 it'may be oscillated or rotated to regulate the passage of air through the air slot 9. I

The screw 71, is adjusted to regulate the longitudinal position of the air shutter It, so

that the passage through the slot g may be slightly greater or slightly less than the pas- I saged between mixing chamber a and.

the induction tube f. Byithese means a suit. 5-

able mixture is provided when the throttle s is only slightly open. This mixture may be a rich mixture ora weak mixture, according to the position of the screw it.

The air shutter his preferably provided ,with a circumferential slot 72, working over the end of a screw 'gflso that its rotarymntg tion is limited.

When it is desired to operate the throtti'e} e automatically, 1 provide it with a central rod 6, which passes through one end of the mixing Chan er (2, and carries an o crating piston c id which is locate 1 within 7 a closed end 2'. A pasa cylinder has. sage 2' is arrangedbetween the induction pipe f and the said cylinder e, so that asthe speed of the engine increases, the suction on the said oper ggrlstonc causes the throt-v tie a to once 1e F; andairopenin g g, 1 to the uire'ments of the engine, 9

is operating piston is moved in the'oppo. direction by means of'a coiledspring e,

- of which regulates the depresr or suction chamber 2'.

s cylinder 2' is provided inthe cylinder. Air also leaks through the joint between the end i and'the cylinder 2'. An ordinary butterfiy throttle f is employed in the induction pipe 7', by means of.

which the suction on the automatic operating piston may be regulated.

In order to insure that a proper flow of air takes place past the jet Z1, the passage through the mixing chamber (1 is approximately equal to the passage through the slot d,between the top of the mixing chamber d and the induction pipe The passage through the mixing chamber d may be regulated by making the central rod 6 of the.

automatic throttle e of the requisite .cross 2 sectional, area to leave the desired passage in the mixing chamber d.

a In the hand controlled carbureter shown in Fig. 4, the throttle 6 slides over a central rod E, which is made to the required cross sectional area to produce the desired area in the mixing chamber (1.

' E is a bar fixed to the sliding throttle e, by means of which the throttle e may be controlled by hand by any usual or convenient mechanism.

What I claim is 1. In a carbureter for internal combustion engines, the combination of a mixing chamher in the side of which is formed afuel slot, a sliding'throttle in said chamber, a

separate air intake of circular cross section located below the mixing chamber and communicating with the mixing chamber by means of a .slot, a shutter fitting the interior of the air intake and having a slot corresponding with the slot connecting the air intake and mixing chamber, and means for oscillating the said shutter'to regulatethe passage of air into the mixing chamber, substantially as set forth.

2-. In a carbureter for internal combustion engines, the combination of a mixing cham-' her in the side of which is formed a fuel slot, means for regulating the passage of the fuel to saidslot, a sliding throttle in said chamber, 'a separate air intake of circular crgss section located below the mixing chambar and communicating with the mixing chamber by means of a slot, a shutter fitting the interior of the air intake and having a slot corresponding with the slot, connecting the air intake and mixing chamber, and

means for oscillating the said shutter to regulatethe passage of air into the mixing chamber, substantially as set forth.

3. In a carbureter for internal combustion engines, the combination of a mixing chamher in the side of which is formed a fuel slot, a sliding throttle in saidchamber, a. separate air intake of circular cross section located below the mixing chamber and communicating with the mixing chamber by means ofa slot, a shutter fitting the interior of the air intake and having a slot corresponding with the slot connecting the air intake and mixing chamber, means for os- -cillating the said shutter to regulate the passage of air into the mixing chamber, and a screw screwing into the closed end of the air lntake to regulate the longitudinal positf ion of the said shutter, substantially as set orth.

a. In a carbureter for internal combustion engines, the combination of a mixing chamber in the side of which is formed a fuel slot, an eccentric pin adjacent to said slot to regulate the'passage of fuel to said slot, a sliding throttle in said chamber, a separate air intake of circular cross section located below themixing chamber and communicating with the mixing chamber by means of a slot, a shutter fitting the interior of the air intake and having a slot corresponding with the slot connecting the air intake and mixing'chamber, and means for oscillating the said shutter to regulatethe passage of air into the mixing chamber, substantially as set forth.

5. In a carbureter for internal combustion engines, the combination of a mixing chamber in the side of which is formed a fuel slot, a sliding throttle in said chamber, a rod connected to said throttle, a piston carried by said rod, a cylinder having a closed end in which said piston is located, an induction pipe, a passage connecting the cylinder with the induction pipe, a spring in said cylinder acting against the said piston. a separate air intake of circular cross section located below the mixing chamber and communicating with the mixing chamher by means of a slot, a shutter fitting the interior of the air intake and having a slot corresponding with the slot connecting the air intake and mixing chamber, and means for oscillating the said shutter to regulatethe passage of air into the mixing chamber, substantially as set forth.

6. Tn a carbnreter for internal combustion.

engines, the combination of a mixing cham- 1 her in the side of which is formed a fuel slot,

a sliding throttle in said-chamber, a rod connected to said throttle, a piston carried by said rod, a cylinder having a closed end in which said piston is located, asmall air hole in the end of said cylinder, a light fiat spring W thin the cylinder'covering the said air hole, an induction pipe, a passage connecting the cylinder with the induction pipe, 9.

spring in said cylinder acting against the seicl pision e separate sir intake of eireules cross section-located iieiow the mixine chem- 391' cominunieeting with the mixing chamber by means of e slot a shutter fitting the interim of she air intake and havin 'te slot corresponding with she siot connecting the sir intake and mixing chamber end means for osciilating the seici shutter to leg ulzite the passage of air into the mixing chamber, substsn'eiell es set forth.

' '5. In a esirbureeei tor internel combustion engines, the combination of e floss ieeai chamber, a mixing chamber having a. fuel slot in the side thereof, an eccentric pin for regulating the supply of fuel to the fuel slot, a sliding throttle in the mixing cliembeng'en induction pipe communicating with the mixingoiieniloer, another throttle in said induciionpipe, separate Eiii intake of circular CX'GSS section below the mixing ehember and communicating therewith by means of a slot, an oscillating shutter fitting said air intake, meensfor oscillating said shutter, a screw screwing into the slosed end of the air intake to regulate the iongituciinal posit-ion of said shutter, a cirtcnn1ier,-

entiel slot in said shutter, and s screw passing through the air intake over the inner end of which Works iiie said cii-cum'ferentiei slot, substantially as set forth.

8. In a cerloureter for internal combustion engines, the eombineiien of e feee circular cross section eheniber s mixing chamber heving s slot in the side thereof, en eccentric pin -eguletin the suppiy of fuel to the sleie sii ring ilirottie in she mixing sham. leer, sn induction pine eoznmunicetin the mixing elismher, another throttle in induction ipe, e eylinfier epessege 35am nesting seicl cylinder Wit i die inciuctien pipe, an air hole in the end of said cyiincie a fist spring within seiii cyiiner CGVfiliEi said sir hole, :1 spring-messed piston in ssi 1 cylinder connected to t e siiing ishrottie the mixing chamber, a se smite air intake of eiow the chamber and communicating iillfil'BWii7il lay means of a slot, an oscillating sinister fitting said air intake, means for oscillating ssie shutter, a screw screwing inio the closed end of the air intake to regulate the longitgiciinei position of said shutter, e oireumferentis' slot in sei i shutter, and ii screw passing through the air intake over the inner end of which Works'ihe said cii'cumfereniiei slot, substantially as sci forth.

In Witness-whereof l have heseunizo see hand in the presence of two wisnesees.

WILLIAM E. MARTIN. Witnesses:

c GLAUDE K. Mme,

"WM. GrinLiNs. 

